diff --git a/tests/api/routes/controller/test_appliances.py b/tests/api/routes/controller/test_appliances.py
index 089466c2..ef61fb0f 100644
--- a/tests/api/routes/controller/test_appliances.py
+++ b/tests/api/routes/controller/test_appliances.py
@@ -21,12 +21,19 @@ import shutil
 
 from fastapi import FastAPI, status
 from httpx import AsyncClient
+from gns3server.controller import Controller
 
 pytestmark = pytest.mark.asyncio
 
 
 class TestApplianceRoutes:
 
+    @pytest.fixture(autouse=True)
+    def _install_builtin_appliances(self, controller: Controller):
+
+        controller.appliance_manager.install_builtin_appliances()
+        controller.appliance_manager.load_appliances()
+
     async def test_appliances_list(self, app: FastAPI, client: AsyncClient) -> None:
 
         response = await client.get(app.url_path_for("get_appliances"))
diff --git a/tests/api/routes/controller/test_images.py b/tests/api/routes/controller/test_images.py
index 4ca09389..7aa09f22 100644
--- a/tests/api/routes/controller/test_images.py
+++ b/tests/api/routes/controller/test_images.py
@@ -263,6 +263,7 @@ class TestImageRoutes:
             controller: Controller
     ) -> None:
 
+        controller.appliance_manager.install_builtin_appliances()
         controller.appliance_manager.load_appliances()  # make sure appliances are loaded
         image_path = "tests/resources/empty30G.qcow2"
         image_name = os.path.basename(image_path)
diff --git a/tests/controller/test_controller.py b/tests/controller/test_controller.py
index ab62adb9..63987dfb 100644
--- a/tests/controller/test_controller.py
+++ b/tests/controller/test_controller.py
@@ -380,6 +380,7 @@ def test_appliances(controller, config, tmpdir):
         json.dump(my_appliance, f)
 
     config.settings.Server.appliances_path = str(tmpdir)
+    controller.appliance_manager.install_builtin_appliances()
     controller.appliance_manager.load_appliances()
     assert len(controller.appliance_manager.appliances) > 0
     for appliance in controller.appliance_manager.appliances.values():